Package: sbuild Severity: wishlist According to the man page of dpkg-buildpackage: -j, --jobs[=jobs|auto] ... Will add itself to the MAKEFLAGS environment variable, which should cause all subsequent make invocations to inherit the option, thus forcing the parallel setting on the packaging (and possibly the upstream build system if that uses make) regardless of their support for parallel builds, which might cause build failures...
and `-J` seems to be the right option. However, sbuild does not support `-J`, neither does it mention it will lead to an unsafe option of `dpkg-buildpackage`. Please add support to the `-J` option, or at least refer to the `dpkg-buildpackage` man page in sbuild man page.